Terminal connection



p 8, 1931- A. B. DIBNER 1,822,693

TERMINAL CONNECTION Filed Dec. 26, 1928 Arm am ammo DIME/z 1 NVENTORATTORNEY Patented 2 Sept. 8, 1931 v UNITED STATES ABRAHAM BERNARDDIBNER, OF PEEKSKILL, NEW YORK TERMINAL CONNECTION Application filedDecember 26, 1928. Serial No. 328,510.

This invention relates to electrical equipment and particularly terminalconnections for copper cable used in what is known com-' mercially as ajumper loop tap from a high tension transmission line to connecting hightension apparatus.

In extra high tension electrical WOIl it 1s necessary to attach thetransmission llne to a structure such as a sub-station or feeder line.This condition makes it necessary to lead a cable from the transmissionline to such structure' The cable as a consequence is required to bemaintained at a clearance distance from all other materials, andparticul'arly those of ground potential. Itcan be readily seen that itis difficult for a flexible cable to be so maintained in the air forsweeps which often reach a magnitude of fifteen feet in radius. Numerousways have already been devised for attaching the transmission line cableof this character to sub-station apparatus, but invariably the meansemployed involved the use of much special equipment, and in additionbecause of the free end of the transmission line ter- .minus, connectionhas been made diflicult, since this free end is subject to considerablevibratory and swaying movements With the foregoing clearly in mind, itis the purpose of the present invention to provide a jumper loopterminal, which consists in an arrangement of very simple parts, andwhich provides for the flexibility and surety required of thisparticular type of electrical connection. I accomplish this urpose bymeans of the device hereinafter escribed in detail, set forth in theappended claims and illustratively exemplified in the accompanyingdrawings, in which, Figure 1 isva side elevational view of a jumper looptap utilizing my improved connecting unit; Figure 2 is a sideelevational view of the tap; and Figure 3 is a bottom plan View of thesame. Referring to the drawings, the terminal 10 or tap comprises twomain parts, the terminal proper and the clearance sleeve 12', the formerbeing in the form of a terminal, i. e., a bracing arm 11 disposedlongitudinally of the sleeve 12 and provided with spaced v oppositelydisposed pairs of lugs 13 which accommodate the ends of U-bolts 14, theclosed ends thereof embracing the sleeve 12 and the threaded free endsprojecting through openings in the lugs 13 to, receive nuts 15. The nuts15, when tightened, tend to draw the U-bolts 14 against the arm 12 andbind it to the bracing arm 11. The sleeve 12 constitutes a tubularmember of any required length suflicient to maintain the transmissioncable 16 at suflicient clearance beyond any other apparatus. The innerend of the sleeve 12 abuts a socket 17 integral with the bracing arm 11and provided with a recess 18 into which the terminal end of the cable16, projecting through and beyond the sleeve 12, is inserted andpermanently aflixed by means of solder, clamping or other means. Thecontacting part 19 of the terminal comprises a plate integral with thebracing arm 11 and projecting beyond the socket 17, the plate beingprovided with a plurality of openings 20 to receive clamping bolts. 21and fasten the terminal to the high tension equipment or sub-stationapparatus 22.

Installation of my improved jumper loop tap or terminal is accomplishedas follows: The sleeve 12 is slipped over the terminal end of thetransmission line cable 16, the end thereof being thereafter insertedinto the bore 18 of the socket 17 and securely soldered or otherwisefastened. An electrical contact is then established between thesubstation apparatus 22 and the transmission cable 16. The sleeve ortube 12 and the'ad jacent portion of cable 16 are elevated into positionagainst the bracing arm 11 and the U-bolts 14 adjusted and tightened bythe nuts 15 to rigidly secure the tubular sleeve 12 and terminal proper10 together.

It might be mentioned that in the illustration of my invention I haveshown the sub-station apparatus 22 mounted upon an I-beam 23 and fromthe lower flange thereof projects the dead ending insulators 24terminating in a strain clamp 25, the strain clamp 25 embracing aportion of the transmission line cable 16 at a point remote from thejumper tap 10. i

The installation according to the present invention has the advantage ofrequiring no special tool or other construction device, is extremelysimple and has the ability to maintain complete and any predeterminedclearance. The invention insures complete flexibility at the swaying endof the dead 4 ending string of insulators, coupled with the gradualrigidity at the terminal end of the transmission line, this conditionbeing necessary to prevent crystallization, It also permits thecontinuance of the transmission line cable unbroken into the finalterminal point. v

What I claim as new and desire to secure by Letters Patent is:

1. A terminal connection for electrical cable installations, comprisingan integral member having a bracing, arm, a socket and a contactingportion beyond the socket, a clearance sleeve throughwhich the cable isdisposed, the end of the cable being secured in said socket, andclamping means spaced apart on the bracing arm and adjustable to clampover the sleeve to attach it .to the bracing arm.

2. A- terminal connection, as claimed in claim 1', in which the clampingmeans include U-shaped-bolts, the closed ends thereof'embracing thesleeve at spaced points and the free ends projecting through openings inthe bracing arm, and means on the free ends of the bolts to adjust thelatter against the sleeve.

3. A terminal connector for electrical cable installations, comprisingan angular shaped member having one arm provided with oppositelyprojecting pairs of spaced lugs, a U-shaped bolt adjustable in each pairof lugs and disposed transversely of the arm,

a socket in the other arm having a recess below, and axially alinedwiththe first arm, a contact plate beyond the socket, and a sleeveprojecting through and clamped in position by said U-bolts and abuttingthe socket to receive a cable therethrough, the end of the cable being.disposed in the recess of the socket and secured thereto.

In testimony whereof he has afiixed his signature.

ABRAHAM BERNARD DIBNER.

